<!DOCTYPE HTML>
<html>
<head>
<script type="text/javascript">
function popup() {
  var w = window.open("","","width=200,height=200");
  var canvas = w.document.createElement("canvas");
  canvas.width = 100;
  canvas.height = 100;
  w.document.body.appendChild(canvas);

  var gl = canvas.getContext("experimental-webgl");
  gl.clearColor(1.0, 0.0, 0.0, 1.0);
  gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);

  var a = new Uint8Array(4);
  gl.readPixels(50, 50, 1, 1, gl.RGBA, gl.UNSIGNED_BYTE, a);
  document.title = a[0] + ", " + a[1] + ", " + a[2];

  if (a[0] == 255 && a[1] == 0 && a[2] == 0)
    window.domAutomationController.send("SUCCESS");
  else
    window.domAutomationController.send("FAILED");
}
</script>
</head>
<body onload="popup()">
</body>
</html>
